Rubber hydrohalide-salicylic acid ester compositions



Patented July 25, 1939 I RUBBER HYDROHALIDE-SALICYLIG ACID ESTER COMPOSITIONS Herbert A. Winkelmann and Eugene W. Mofiett, Chicago, 111., assignors to Marbon Corporation, Chicago, 111., a corporation of Delaware No Drawing. Application November 9, 1936, Serial No. 110,013

' i 8 Claims. (Cl. 106-23) This invention relates to halogen containing Table rubber derivative compositions. More particular- -1y it relates to compositions of rubber hydro- Inhibitor Cglofi after Final 0010! Time OUIS halides and esters of salicylic acid and is espe- 5 cially concerned with those esters which retard light disintegration. K? 3Z;" $2 i Tetrahydrofurylsalicylat S1. yellow 76 Halogen containing rubber derivat ves such as B naphthylsalicylate Yellow Deepyenom 52 rubber hydrochlorides become brittle so rapidly on exposure to sunlightthat for some purposes such as for wrapping, sheets of rubber hydroi a gg ij f a i g g our mhibltois 1o chloride are at a disadvantage compared to e 1 ey un ers.oo ey are no an other flexible sheets such as viz regenerated celaclqs m do not mamtam the rubber hydrolulose Sheets which remain fixible over, more halides in that neutral condition which has been stated as desirable for retarding decomposition. l5 P l l penods of tune Plastmlzers and hght The action of our compounds is believed to be a mhlbttors have P adde the P screening or absorption effect. It is believed that chlond? mamtau} fiexlbmty and mhlblt t they absorb light of Wave lengths which are pardeleterlous effect 9 llght- Terpenes Such as i ticularly effective in promoting disintegration of P 1 limonene and dipentene, likewlse halogen containing rubber derivatives. At, the amines Such as heXamethylel'le tetramine and same time their lack of odor, taste and color 20 dicycloheXylamine haVe been usede e pe make them particularly adaptable for use in films I have been objectionable because of odor and taste, of bb hydrochloride which are t be used as while the amine compounds are not as comwrapping sheets, apparel and the like. Their patible as is generally desired, have little or no plasticizing action enhances the inhibiting efiect plasticizing action and, in general, have an oband the good pa ty of thes materi ls 25 jectiohame Odor and taste make it possible to incorporate as high as 10% We have found that menthyl salicylate will reand more Without o i n g. I-I owever, in tard light disintegration of rubber hydrohalides amounts as low as 1/2% then mhlbltmg efiect 15 to a substantial extent and maintain the fiexibilpronounced and it is ordinarily not desirable to ity of films made therefrom over prolonged use more than 1 to 3% by weight on the basis of 30 the rubber hydrochloride. penods f tune Such as a be present m the We have further discovered that the organic m use of p Sheets" Menthyl esters-0f salicylic acid in general are good plastisallcylate Compatlble rubber hydrochlo' cizers for rubber hydrohalide. Among the salicylride in high proportions, is a plasticizer, has 7 ates which have been found to be good p1asti practically no odor or objectionable taste, does cizers are methyl salicylate, butyl sahcylate 1 not promote heat disintegration, and causes little propyl salicylate menthyl salicylate, tet or no discoloration dur n exposure of the comfurfuryl salicylates, and B naphthyl salicylate. position to sunlight. B naphthyl salicylate and We claim: 1 4 tetrahydrofurfuryl salicylate act similar to I 1. A composition of matter comprising arubber 40 menthyl salicylate. hydrohalide and an ester of salicylic acid.

2. A composition of matter comprising a rubber hydrochloride and methyl salicylate.

3. A composition of matter comprising a rubber hydrochloride and tetrahydrofurfuryl salicylate.

The following example and table giving the results of tests will illustrate our invention:

Solutions of saturated permanently amorphous i p hydrochlgngie m g Z01 g g fifg 4. A composition of matter comprising a rubber ,avmg comfm 7 1 0 er y roe hydrochloride and naphthyl salicylate. nde'and 3% mhlbltor bywelght' Transparent 5. As a new article of manufacture, a thin,

thin fiexib1e films were y costinethe flexible sheet composed of a rubber hydrochloride Solutlon on a Smooth Surface, drymg and remov' and an ester of salicylic acid of such character 0 ing the resulting films- Films 50 made were and in such amount as to retard light disintegratestedin a standardized daylight Fadeometer t of t rubber hydrochloride, andgave results as follows, the time in hours be- 6. As a new article of manufacture, a thin, ing the time in which brittleness first became flexible sheet composed of a rubber hydrochloride apparent: and methyl salicylate in such amount as to re- 55 tard light disintegration of the rubber hydrochloride.

7. A composition of matter comprising a rubber hydrochloride and a substance selected from the group consisting of methyl salicylate, naphthyl salicylate, tetrahydrofurfuryl salicylate, methyl salicylate, butyl salicylate and isopropyl salicylate.

8. A composition of matter suitable for the production of flexible film comprising a rubber hydrochloride and a minor proportion of an ester of salicylic acid.

HERBERT A. WINKELMANN. EUGENE W. MCFFETT.

CERTIFICATE OF CORRECTION.

Patent No. 2,167,581., July 25, 1959,

HERBERT A. WINKELMANN, ET AL.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 1, sec- 0nd column, lines L5 and 55, and page 2, first column, line 5, claims 2,

6 and 7 respectively, for the word "methyl" readmenthyl; and that the said Letters Patent should be read with this correction therein that the same may conform ,to the record of the case in the Patent Office. Signed and sealed this 19th day of September, A. D. 1959.

Henry Van Arsdale. (Seal) Acting Commissioner of Patents. 

